You must set a screen unlock PIN or password for Android to allow the steps below:
- Click the 'Root Certificate' button
- In the 'Certificate name' field enter 'ck'
- In the 'Credential use' field, leave the selection at 'VPN and apps'
- Click 'OK'
Install and trust the root certificate on your device.
Download the root certificate by clicking the Root Certificate Button:
Device Specific Installation Instructions